Install metal lath over the painted concrete wall if you don t want to sandblast.
Plaster over concrete wall.
Plaster is applied to concrete masonry surfaces in two or three coats consisting of basecoat s and a finish coat.
Before you begin to plaster your concrete walls you need to remove peeling paint and flaking bits of old plaster.
In this video i am showing one way a person can make their.
To prepare the surface for the plaster of paris you would first need to apply a scratch coat base coat.
Remove any crumbling or damaged sections of plaster.
However avoid saturating the masonry either by excessive spraying or by exposure of uncovered masonry walls or units to rain.
Caulk cracks and kill any mold on the walls.
How to plaster a concrete wall step 1.
The texture of the concrete walls should be sufficiently rough so the plaster will adhere to it.
Blend a bag of plaster mix with water according to the manufacturer s instructions.
Prepare the concrete wall.
Use 7 8 inch concrete screws.
The mixture can be placed.
Caulk any cracks.
How to repair plaster over concrete walls step 1.
Your walls should be free of paint oil and dust so the plaster can bond properly.
In addition if plastering over an interior smooth surface such a concrete or cinder block wall you can also use a plaster bonder to improve adhesion of the base coat.
Use a wire brush to clean stains left by the mold or mortar joints.
Step 2 apply a layer of dash.
If the wall has been painted and the paint is peeling or flaking all of the paint.
Cement plaster is usually made up of portland cement sand and lime.
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The loose sections should be easy to remove by hand.
Apply a thin.
Prior to application of the basecoat uniformly pre moisten concrete masonry surfaces to aid in curing of the plaster.